54105517 has 4 divisors (see below), whose sum is σ = 54128700. Its totient is φ = 54082336.

The previous prime is 54105511. The next prime is 54105539. The reversal of 54105517 is 71550145.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 34445161 + 19660356 = 5869^2 + 4434^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-54105517 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (54105511) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7642 + ... + 12907.

It is an arithmetic number, because the mean of its divisors is an integer number (13532175).

Almost surely, 2^54105517 is an apocalyptic number.

It is an amenable number.

54105517 is a deficient number, since it is larger than the sum of its proper divisors (23183).

54105517 is a wasteful number, since it uses less digits than its factorization.

54105517 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23182.

The product of its (nonzero) digits is 3500, while the sum is 28.

The square root of 54105517 is about 7355.6452470195. The cubic root of 54105517 is about 378.2223456948. Note that the first 3 decimals are identical.

The spelling of 54105517 in words is "fifty-four million, one hundred five thousand, five hundred seventeen".